SN74LVC244APWR

This octal buffer/line driver is operational at 1.5V to 3.6 - VCC but is designed specifically for 1.65 - V to 3.6 - VCC operation. The SN74LVC244A is organized as two 4 - bit line drivers with separate output - enable (OE) inputs. When OE is low, the device passes data from the A inputs to the Y outputs. When OE is high, the outputs are in the high - impedance state. Inputs can be driven from either 3.3 - V or 5 - V devices. This feature allows the use of this device as a translator in a mixed 3.3 - V/5 - V system environment. To ensure the high - impedance state during power up or power down, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current - sinking capability of the driver. This device is fully specified for partial - power - down applications using LOH. The LOH circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.

Applications

• Level translation for mixed 3.3V/5V voltage systems
• Buffered line drive applications
• Applications requiring partial power-down operation

Key features

• Operates From 1.65 V to 3.6 V
• Inputs Accept Voltages to 5.5 V
• Specified From - 40℃ to 85℃ and - 40℃ to 125℃
• Max tpd of 5.9 ns at 3.3 V
• Typical VOLP (Output Ground Bounce) < 0.8 V at VCC = 3.3 V, TA = 25℃
• Typical VOLV (Output VOL Undershoot) > 2 V at VCC = 3.3 V, TA = 25℃
• Supports Mixed - Mode Signal Operation on All Ports (5 - V Input/Output Voltage With 3.3 - V VCC)
• loff Supports Partial - Power - Down Mode Operation
• Latch - Up Performance Exceeds 250 mA Per JESD 17
• ESD Protection Exceeds JESD 22
• 2000 - V Human - Body Model (A114 - A)
• 200 - V Machine Model (A115 - A)
• 1000 - V Charged - Device Model (C101)